Improvement in steam-governors



l. D. LYN DE.

Steam-Governors.

Patented 0ct.13,1874.

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UNITED 'STATES PATENT CFFICE.

JOHN D. 'LYNDE, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN STEAM-GOVERNORS.

Specification forming part of Letters Patent No. 155,838, dated October13, i874; application filed August 21, 1874.

To all whom it may concern:

Be it known that I, JOHN D. LYNDE, of Philadelphia, State ofPennsylvania, have invented new and useful Improvements in Steam-Governors; and I do hereby declare that the following is a full, clear,and exact description of the construction and operation of the same,reference being had to the annexed'drawings forming part of thisspecification.

The object of this invention is to provide a valve and valve-seats forsteam-governors, which will, by being entirely steam-balanced in allcircumstances, obviate the difculty and wear heretofore produced by thevalve being suddenly unbalanced when Vlarge supply of steam is requiredfor the engine; also, to combine a stop-valve with `the valve andvalvechamber or body of a vertical valve-governor, so that the steam canbe throttled at the induction-pipe of the governor, obviating thenecessity of a separate stop-valve.

It is found that all governor-valves made of the spool or puppet style,although the disks are made of equal size, will be thrown out of balancewhen suddenly required to pass large amounts of steam. This is veryevident when in use on puppet-valve engines. The valves being suddenlyjerked open by cams and as suddenly closed, the jerk caused on the worksof the governor is akin to a blow at the bottom of the valve. Anotherdifiiculty has been that the supply of steam becomes irregular, onestroke getting more than the necessary supply, the next less, and socausing irregularity of speed and undue wear to the engine. Attemptshave been made to remedy this serious difficulty by using very heavyrevolving weights or balls, or by running at a high speed, either casecausing much wear on all the parts of the governor and strain of theengine.

Having thus described the nature and object of my invention, referringto the drawings, the following is the description:

My said invention consists in the construction of a double cup-valve andthe valve-seats with reference to the steam-passages of each, so thatthe valve is, under all circumstances of increase or diminution of theload of the engine, or of the pressure of steam and opening of thesteam-passages, in perfect balance or equilibrium of pressure; also, inthe devices, as shown and described, whereby to admit the quantity ofsteam for the maximum amount of work to be done, which is accomplishedby the valve-stem and its yoke surrounding the pin connecting the twocups of the valve, and thereby to actuate the stop or throttle valve.

Figure 4 is a horizontal section; Fig. 5, a longitudinal section; andFig. 6 (exhibit to explain the difculty described) is a longitudinalsection of a governor valve chamber or body, in which a spool ortwo-disk vertical valve is used, the valve N being shown having guidesbeneath each disk.

Disks B and C, Fig. 6, are of equal size or diameter, and both closewithin their respective seats at same time. When so closed they exactlybalance steam pressing against the bottom of B the same as on the top ofC; but when the valve is raised to let steam pass by disks B and C, asshown by the arrows, the tendency is to throw both disks upward, thecurrents of steam acting as a pry as they force under each disk. Now, aswhen closed disks B and C balance each other, a plan is shown in Fig. 5by which said balance is sustained while steam is passing through thegovernor. R is a valve formed by connecting together two cups by theirrespective bottoms, centrally, by a solid pin of metalwhich may be castwith the cupsfixing them together at the proper distance from eachother. The bottoms of these cups correspond to the disks B and C, Fig.6. About central in the sides of the cups are openings or ports, inwidth nearly one-third the depth of the cup, as shown with arrowsthrough them, Fig. 5. These openings may be made by an entire divisionof the sides of the cup by an annular incision the width of the requiredports, the parts bein g held together by the braces or ties T; or portsmay be cut through, as at T. The valve-Seats are short cylinders, S andS', with ports cut through their sides corresponding to the portsdescribed in the sides of the valve-cups. The cylinders S and S arescrewed or otherwise set into the partititions or holders S and S", theupper one suspended so as to place the ports below the holder S, and thelower set so as to rise above the holder S" correspondingly with theupper one, thus making full connection with i space Z. The valve R ismade of proper length so that when suspended in pla-ce within the seatsor cylinders S and S the ports in the sides of the cups correspondexactly with the ports in the sides of thc cylinders or seats S and S. Vis a stop-valve; V', guides bearing againstledge V. In large governors aguidestem is also used beneath the valve to insure more perfect seating;also to assist in grinding when necessary. V is a yoke or linkconnecting the valve V to the screw-stem F by the swivel V. Through theyoke Vl the governor-valve R works, and the stop-valve V is opened andclosed at will without interfering with the governor-valve R. A pin isshown by dotted lines J, Fig. 4., which is used to prevent the yoke Vfrom tilting and obstructing the operations of the governor-valve.

The operation is as follows: The stop-valve V being opened by thehand-wheel L, steam Will pass through the ports in S and Sf, and valve Rtaking the direction of the arrows, steam also presses equally on thebottoms of the respective cups, (described as forming valve R-,) which,being of equal diameters,

remain steadilybalanced-the same as do the disks B and C, Fig. 6, whenclosed-holding the valve in complete balance, so far as to liability ofbeing unbalanced by the passage of steam by it. Any pressure which maybecaused on top of the valve by reaction from the top of the body A iseasily obviated by disk U, which is fully described in my application ofApril 3o, 1874.

Having thus described the nature of my said invention, what l claimtherein as new, and desire to secure by Letters Patent, is*- 1. Thevalve R, constructed of the two cups provided with openings, asdescribed, and connected together by a pin of smaller diameter, incombination with the valve-seats S and S, substantially as set forth. Y

2. The yoke V, in combination with the screw-stem F, swivel Vm',stop-valve V, govcrnor-valve R, and body A, all constructed and arrangedsubstantially as herein described. JOHN D. LYNDE. Witnesses:

ALEXANDER FOGEL, JOHN H. SEBoLD.

